Build `odrefresh` ART gtests for both 32- and 64-bit architectures.

This is to address current MTS test failures. This also aligns
`odrefresh` ART gtests with other ART gtests, which are built for both
32- and 64-bit architectures (when supported by the build target).

Test: m mts \
        && mts-tradefed run commandAndExit mts-art \
             --module art_standalone_odrefresh_tests
Bug: 203853789
Change-Id: I0d91ee8a5a9b38e5ed2e6a7d4cacd31506635605
diff --git a/odrefresh/Android.bp b/odrefresh/Android.bp
index 8d5e443..5426e37 100644
--- a/odrefresh/Android.bp
+++ b/odrefresh/Android.bp
@@ -180,11 +180,6 @@
     static_libs: [
         "libgmock",
     ],
-    target: {
-        android: {
-            compile_multilib: "first",
-        },
-    },
 }
 
 // Version of ART gtest `art_odrefresh_tests` bundled with the ART APEX on target.